Nmap Development mailing list archives

Re: NSE: Need advice on pulling SSL cert used for TLS connection over SMTP port 25


From: SM <sm () resistor net>
Date: Fri, 02 Oct 2009 08:48:40 -0700

At 16:21 01-10-2009, Tom Sellers wrote:
Basically I am trying to gather information about the SSL certificate that
is being used for a SMTP over TLS connection on port 25.  The problem is that
the session starts out non-SSL.  Once the connection is made, and if the
server supports it, the client issues the STARTTLS command and then a TLS
connection is negotiated.

You'll have to establish a non-SSL session first, do an EHLO to see whether the server advertizes STARTTLS and then do the SSL negotiation using the existing session.

Regards,
-sm

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